Chapter
Apr 26, 2012
Quantification of the Specific Aggregate Surface Area Using X-Ray Tomography
Authors: Linbing Wang and David J. FrostAuthor Affiliations
Publication: Recent Advances in Materials Characterization and Modeling of Pavement Systems
Abstract
This paper presents a new method using x-ray tomography imaging to quantify the specific surface area of aggregates. The method reconstructs the three-dimensional (3D) representation of individual particles and computes the specific surface area and the sphericity (a shape factor) of individual particles. The quantified specific surface area of a limestone aggregate in the sieve size range (3/8"-No.4) indicates that the specific surface area and the sphericity have a large variation among individual particles. However, the overall specific surface area of the aggregate particles within the same sieve size range can be accurately obtained using about 25–30 particles. It has been found that the specific surface area of the aggregates is much larger (84%) than that of the spheres of equivalent size.
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© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Aggregates
- Chemical processes
- Chemistry
- Computer vision and image processing
- Computing in civil engineering
- Earth materials
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Geomaterials
- Geotechnical engineering
- Infrastructure
- Limestone
- Materials engineering
- Methodology (by type)
- Particle size distribution
- Particles
- Pavements
- Radiation
- Radiography
- Stones
- Transportation engineering
- X rays
Authors
Affiliations
Linbing Wang
P.E.
M.ASCE
JFAP Assistant Professor, Department of Civil and Environmental Engineering, Louisiana State University/Southern University, Baton Rouge, LA 70803
David J. Frost
P.E.
M.ASCE
Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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